Telegraph printer



` sept. 1,1942. 1 MMCQQLS f 2,294,688'

FIGA.

TELEGRAPH PRINTER y originalv Fuera Nov. 4, 1939 6 sheets-sheet 1 s4 142 f 64 :44h '28. l l 66aA 63 4 67 3a 'i Y ao 5154 55V 'n 9 5856 fao 6a so 4,

. 6 144e "4b 6l i405 75a A I ATTRNEY Sept 1,1942- f H. J. mcHQLs n 2,294,688

TELEGRAPH PRINTER original Filed Nov.V 4, 1959 e sheets-shew` 2 M FIGS. 1

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Sept 1, 1942. I -H.J.VN|cH oLs i A, 2,294,688 i TELEGRAPH PRINTER original Filed Nov. 4, I19:59 esheeis-sheet s ruim. i H615. Flei. FIGAZ 11618.

l Y v 102g l M2 r- INVENTOR r @a/M i Sept. 1, 1942. H..|, NlcHoLs K f 2,294,688l

'- TELEGRAPH PRlNTER v N original Filed Nov.. 4, 19:59 e Smeets-'sheet 4 ATTRNEY Sept 1, 1942- H. J. NlcHoLs l2,294,688

TELEGRAPH PRINTER Original Filed Nov. 4, 1959 6 Sheets-Sheet 5 ril,

' lNvENToR ATTORNEY Sept. l, 1942.

H. J, NlcHoLs i TELEGRAPH PRINTER original Filed Nov.. 4, 19,59`

m Fleau.

e sheets-sheet ves aaa fao 160 i INVENTOR Patented Sept. l, r.1942

TELEGRAIH PRINTER Harry J. Nichols, Binghamton, N. Y., assignor to International Business Machines Corporation, New York, N. Y., a corporation of New York Original application November 4, 1939, Serial No.

302,877. Divided and this application November 29, 1940, Serial No. 367,715

6 Claims.

This invention 'relates to printing telegraphy and more particularly to novel printing mechanism for a printing telegraph receiving device wherein a. message is recorded by characters -printed upon a tape. Y

The invention embodies novel printing mechadevice.

nism controlled conjointly *by novel aggregate motion mechanism and by signal controlled means and is a'division of applicants copending application Serial No. 302,877 iiled November 4, 1939, which has matured into Patent No.

2,275,641, issued Manch/ro, 1942.

More specically, the device embodying the invention comprises a receiver for printing telegraphy including accumulator mechanism and novel combined printing and shifting mechanism-con- Y trolled'iby the accumulator mechanism.

Fig. 4 is an end view of the friction element of the mechanism as illustrated in Fig. 3.

Fig. 5 is a plan View, generally similar to Fig. 1, with certain parts omitted and others illustrated, l

to more clearly illustrate the operation of the rig. 6 is a fragmentary end elevation illustrating the operative elements of the selecting, resetting and accumulating mechanisms.

Fig; 7 is a detail view illustrating the storage tumbler selecting element orf Fig. 6.

Fig. 8Y is a fragmentary end elevation illustrating the control mechanism for the start-stop Shaft of Fig'. 1.

Fig. `9 is a fragmentary end elevation illusi trating the operative elements of the driving and Similar devices of the prior art have required y a complicated duplication of printing elements cooperating with several sets of printing characters.

In view of the vabove conditions prevailing in the prior art, one of the objectsof the present invention is to provide novel printing means for a telegraph receiver wherein the foregoing undesirable characteristics are eliminated.

Another object is to provide` a receiver for printing telegraphy including novel means, con"- tlnuously rotating duringa cycle, for controlling -the printing elements.

Still another object is to provide in a telegraph receiver, accumulating means rotating always in the same direction to position certain printing means, said accumulator means cooperatingvwith rotating means controlling operation of means conjointly acting with said printing means.

Another object is to provide in a telegraph receiver, novei printing means wherein selection of the character to be printed and printing thereof are smoothly combined with elimination'of disturbing and retarding effects.

' construction of the ngered spring disk of the Other objects of the invention-will be pointed out in the following description and claims and illustrated in 'the accompanying drawings, which disclose, yby way of example, the principle orf the invention and the best mode, which has been contemplated, of applying that principle.

In the drawings:

Fig. 1 is a planview illustrating one embodir ment of the invention. l

Fig. 2 is a front end elevation as illustrated in Fig. l.

Fig. 3 is a detail side view of .one of the frictional driving mechanisms of the device in Fig. 1.

of the device K control mechanism for the printing wheel and accumulator.

, Fig. 10 is a fragmentary end elevation illustrating the operative elements of the driving and control mechanism for resetting the accumulator mechanism. and printing wheel.

Fig. 11 is a side elevation illustrating the accumulator mechanism and the'drive and'control elements for the same.

Fig. 12 is a side elevation in section, illustrating the construction of the accumulating mechanism of Fig. 11 and its connection to the printing wheel shaft.

13 is a detail end view -of the respective disk elements of the accumulator device.

Fig. 14 is a detail end view illustrating the manner of mounting one of the control pawls of the accumulator upon the respective disks thereof.

pawl element of Fig. 14.

Fig. 15.

Fig. 17 isfa detail end view il1ustratingthe accumulator as shown in Fig. 12.

Fig. 18 is a side elevation of the elem'ent of Fig. 17.y y

Fig. 19 is a view, partly diagrammatia'illustrating the method of operation ofthe accumulating mechanismshift control mechanism.

Fig. 221s a sectional pian view including the mounting of the mechanism as illustrated in Fig. 21.

Fig. 15 is a. detail-end'view' iuustratmg the tuating mechanism.

. spring element of Fig. 27.

Fig. 23 is a detail perspective view illustrating the construction of the printing hammer or platen element. v l

Fig. 24 is a plan view of the printing wheel.

Fig. 25 is an end elevation of the printing wheel. y

26 is a detail perspective view of the printing wheel shaftslot and pin means for mountingand controlling the shift mechanism.

Fig.k 27 is a detail perspective view illustrating the construction and assembly of the shift acyFig. 28 is a detail end view of the ring shaped Fig. 29is a detail perspective View of the casing of the shift mechanism.

Fig. 30 is a diagram illustrating graphically the timing of the operations of the various ,mecha-L nisms of the novel receiverfor printing telegraphy.

Referring to the drawings andv more particularly to Figs. 1, 2 and 5, the receiver is mountedV upon a base 40 carrying plates 4l and 42 in which are journaled the ends of the shafts supporting the several rotary elements.

A motor 43 (Fig.l 5) is provided with a main power shaft 4`4 carrying Va pinion 45 meshing with gear 46, provided with a hub 41. Gear 46 is fastened to a shaft 48 by a set screw 49 passg' ing through the hub-41. Shaft 48 has attached thereto the` driving element of the start-stop clutch 60, which may comprise any type of eccentric, positive action` clutch. A start-stop shaft 6|, journaled at one end by shaft 48 and at theI other end by plate 4I, is attached in any desired mannerto the driven element 58a (Fig.

` s) of the, start-stop clutch so. A stop pin sz is mounted on the driven elementia to control the rotation thereof-and of the start-stopshaft in amanner that will be discussed in detail later. Mounted on the start-stop shaft 6| for rotation therewith and extending sequentially from trip lever'or #ii-disk control cam 63 (Fig; 1), ilve sequence cams 64, 5'5, 5661, and 68 for feed control cam.6l, and the print hammer trip crank. 62 (Figs. `5 and 20). When stop pin 62 later) the driven cam element 56a is disengaged from the driving element of cam 60 in a manner well known in the operation of such eccentric clutches, and the shaft 5| rem-Pains stationary while motor 43 continues to` rotate shaft 48 and the driving element of start-stop clutch 66.

When pin 62 is released, the driving and driven clutch elements of clutch 68 engage each other `and the start-stop clutch rotates one complete the driven end to the front end thereof are a l (Figs. l, 11, and 12) mounted loosely by sleeve 69a on the printing or typewheel shaft 10, jour- Y naled at one end in plate 42 and at the front end in plate 4l. Sleeve 69a is attached to the #6-disk of the accumulator 1l for rotation of 'and control of said'disk as will be described in detaillater. A pin 69h attached to gear 69 is controlled by cooperating'stop means as will be described in detail later.

Meshing with floating gear) 68 yis a gear 12 (Figs. 1, 11, and 12\)\, carrying a pin 12b controlled by cooperating stop meansas will be described in detail later. Gear 12 is mounted on and fastened tothe hub 13 o'f'the`#1disk, which hub is fastened by pin 14 to shaft 10 for y rotation 4thereof whengear 12 is released as will be described later.|

A combined shift typewheel device is (Figs. 1

10 for rotation therewith and movement axially thereof as will be described later.

To enable the setting, printing and restoring cycles to be completed during a time interval corresponding approximately to one revolution of the start-stop shaft, the typewheel and the restoring #6-disk are run at slightly more than ated by the line signals, has an armature 11 mounted for oscillationon pivoted axle 18 and is biased by spring means 19 to the "off or de-4 energized position. A pair of elongated cylindrical members 18a fastened to axle 18 carry at their ends the utter vane or interposer 80.

l di As will be' seen by reference to Fig. 8, the intersequentially operating the storage tumblers in .accordance with the received signals; a tumbler reset cam 66, the #l-diskVcontrol cam 60, a tape poser lSli is held in abutting relation to a startstop trip lever 8|mounted for movement of f thereto. A front con'ib 88 provides lateral guides (Fig.8) is held by its cooperating elements (see for the trip lever to maintain the oscillatory movement in a vertical plane. net 16 is energized, the vane or interposer 86 is held as illustrated in Fig. 8 with the hooked `end- 55 81a of the trip lever abutting the edge of the :element in the normal course Meshing with gear 46 is a gear 66 having an hub 64 attached by screw 64a to auxiliary shaft 66 iournaied at one end in` plate 42 and at the front end in the plate 4I. Attached to the auxiliay shaft 66 by pins 66a 1(Ii'lg. 3) are the driving elements,l 66a of a clutch arrangement com-A prising a floating gear 61-'(Flg. 1). Driving ele- .ments 66a abut, respectively, friction lrings" 66h attached to the gearY 61 on opposite sides thereof, i .whereby the gear 61 maybe driven when not restrained from rotation and whereby said gear 61n floats over the driving elements 66a when it is vane. In this position, the sloping lug 8Ibon i the trip lever is in engagementwith the stop pin 62 on the driven member 60ay of the start-stop clutch `6|I. Upon reception of a start signal, magnet 16 is deenergized, the spring 19 snaps the vane 80 away from the hooked end 8| a of lever 8|,.the lever 8| is cammed downwardly, as viewed in Fig. 8, by theaction of pinl62 on lug 8Ib, permitting the pin 52 to pass the lug 'one complete rotation. As soon as the lstop pin 62 has passed fthe lug lib/the trip lever is restored to-its operative stop position by means of the spring llc.

helical series axially and circumferentially of the start-stop shaft 6| and are rotatable therewith into operative position with live corresponding 68y (Figs. 1 and 5) is similarly` mounted on twice the speed of the start-stop shaft. By-

When the ma's- 81h, and the lstart-stop shaft 6I is startedon its y Referring -to Figs. 6 and 7, the five sequencel cams 64, 66,- 66, |51, and 68 are arranged in a an ear portion 9B of the back signal storage tumblers 54a, 55a, 58a, 51a, and 58a (Fig. 5), respectively.

Novel means are now provided comprising the storage tumblers themselves, whereby the signals received by the magnet 16 are sequentially effective and whereby no succeeding signal can be effective until the preceding signal hasv been completely stored. The storage tumblers are mounted in the back comb 82 and the front comb heel step 84 as a pivot. Upon such oscillation,

the hooked end 86 of. the respective tumbler slides behind the interposer 80, thereby blocking the same `from operation until the cooperating cam on the start-stop shaft has ridden past, even if the following signal has already begun and has produced its eiect on magnet 16'. Sullicient time for the storage of each respective signal section and operation of the respective cooperating cam is therefore provided by the novel mounting of the tumblers. Upon energization of the magnet 16, the vane 80 assumes the position illustrated in Fig. 6 which is such that when none of the tumblers is contacted by its respective cam, a slight clearance exists between the hooked ends 86 of the tumblers and the vane 80 but the vane 80 is located directly below the hooked ends 88. When any sequence cam on the start-stop shaft engages its corresponding sloping lug 85, the hooked end of the tumbler engages the end of lvane 80 andthe tumbler is oscillated, about the vane 80 as a pivot, until a heel step 81 on` the tumbler isv moved into alinement with the opening 88 in the back comb. The tumbler is thereupon jerked backwardly by a spring 89 until heel step 81 engages the back comb, as shown in Fig. 6, and the end 90 of the tumbler engages the wedgeshaped end of a tripping pawl generally designated as T in Fig. 6

to trip the pawl and control the setting of en accumulator disk, so that the selected storage tumbler releases its respective accumulator disk. It is to be noted that even if a sequential signal attempts to operate the magnet 16, the armature is held by the sequence cam acting on the lug 85 holding the hooked end 86 tightly against the Vane 80 and thereby holding the armature in place until the respective cam has cleared the tumbler lug. Only the centers" of the succeeding signals will therefore be eii'ective andV the signall sections will each be properly sequentially stored without interference by the succeeding signal section, and in a simple and direct manner.

A lug 9| is provided on each tumbler which cooperates with af reset vane 92 carriedby pivoted axle 93 oscillated by arm 94 which is biased counterclockwise by a spring 95 connected Iat one end to the arm 94 and at the other end to comb'.k Arm 94 carries at the, end thereof a follower roller 91 cooperating with the tumbler reset cam 59 on the start-stop shaft At the proper time in the cycle of rotation of shaft 5|cam 59 engages arm 94 which oscillat'es f follower 91, to actuate axle n te move the reset vene s2 against the, lugs 9| of each of the tumblers which has been` selected, to return the same to normal position with:y the heel step 84 thereof abutting the back guide comb 82.

Referring to Fig. 9, there is illustrated therein the, trip means cooperating with the #l-disk control cam 80 on start-stopn shaft 5i for controlling the rotation of the combined printing wheel and shift mechanism' and the rotation of;

the novel accumulator means. Floating gear 88 in the samemanner as oating gear 61 is con stantly urged to rotate by the friction rings 88h (Fig. 3) as outlined above with respect to gear 81 and mesheswith gear 12 mounted on and fastened to the printing or typewheel shaft 10.

Pin 12b is provided on gear `12 cooperating with a lug 98 on onearm 99 of a bell-crank lever |00 to hold the gear 12 in stop position against the torque exerted by gear 60. The other arm 99a is biased clockwise by spring|0| and carries at its end a cam follower 80a'cooperating with #1- disk control cam 80 of the start-stop shaft 5|.

When the rise" of cam engages follower 80a, the timingk of which will be described later, the bell-crank |00 is rotated counterclockwise against the force of spring 0|, the lug 98 releases pin 12b and the gear 12 is vrotated by the floating gear V80 which is constantly urged 'into rotaton as set forth above. As gear 12 rotates, it rotates the combined printing wheel `and shift mechanism 18y (Fig. 1) in accordance with the setting of the novel accumulator means 1|. If'no disk on the accumulator means has been released, a couple is exerted on shaft 10 but its'rotation is prevented until one of the accumulator disks is released as will no w be described.

Referring to Figs.' 11 to 19 inclusive, the novel accumulator or translator means 1| comprises the ve disks designated as #l-disk, #2-disk,

#3-disk, #4-disk, and #5-disk, respectively." The #2a, #3a, #4a, and #50', respectively, mounted on .f

they shaft 10, as' seen in Fig. 14, and located between the respective disks. EachpawL as will be seen from Figs. 15 and 16, comprises a wedge shaped tripping portion T at one end cooperating with the extension (Fig. 6) ofthe respective storage tumblers whereby the pawl is tripped or is moved to the right, as viewed in Figs. 11 and 12, against the-spring forceV exerted by ya fingered spring disk |02, mounted on the` shaft 10 as seen in Fig. l12, with fingers |02a (Fig. 17) engaging the sides of the pawl. Each pawl is circular in outline and encircles thehubl of the respective disk, as seen in Figs. 12 and 14. I'he opposite end of the pawls is designated as S and Y comprises the stop endfof the pawl which cooperates'with the slots SI, S2, S3, S4, and S5 formed in the circumference ofthe #l-disk. #2-disk, #3-disk, #l1-disk, and #5-disk, respec-l tively (Flg. 13).

`,Referril'ig'to Fig. 13, each of the five disks is shown as provided with a circumferentially extending slot, the extent of each of the respective slots varying with the particular disk. The #1- disk is provided with a slot SI extending 90 about its circumference and is therefore capable of rotating 8 type wheel units, the #2-disk has a slot S2 extending 45 and therefore can rotate 4 type wheel units, the #3-disk has a slot. S8 extending and therefore `can be rotated 16 type wheel units, the #t4-disk has a-slot S4 extending v221/2 and therefore can be rotated 2 type wheel units extending 111A 1 unit. By combining the numerical number of units"A of the respective disks, any number from 1 to 31, inclusive, can be produced. 1f no signals are received, the typewheel will remain in zero and the #i5-disk has a slot ss position, even though the start-stop shaft is released, since no 4accumulator disk has been released. The typewheel will remain in its zero position until after the print period of the cycle whereupon the #6-disk is released to thereby release the typewheel and 'it will rotate 360 to return to its zero position. The #I3-disk is asand therefore can rotate'but 5 ping of 'pawl #5a This angular rotation is completely acsigned the 180 slot or in other words is capable y of 16 units f rotation, in order to facilitate` its use with the well known Baudet code. In theL Baudot code, the letters shift function is represented by the signal combination 1, 2, 3, 4, 5 while the figures shift function is represented by the signal combination 1, 2, 4, 5., As `will be described in detail later, the designation of the #t3-disk -as the 16 unit disk is essential when utilizing the Baudot code. ,y

As is seen in Figs. 12 and 22, the combined typewheel and shift mechanism is attached to the #l-disk by means ofshaft 10, sleeve 13 and pin' 1l. llhe #l-disk accumulates all the angles of the tripped disks of higher number and there- 'lO sive, have been tripped and the respective disks have been rotated, the #i-disk and the typewheelv will have rotated a total of 348% or 31 units of the typewheel, or in other words, the

typewheel will have rotated to the letters shift i l1: position, as will be explained later.

If, for example, the #3a.pawl, only, had not" been tripped, the #l-diskthrough its rotation with the released disks would rotate only l5 units since rotation of the #l-disk is prevented for 16v units when the #3A-disk is not released. This fore'the typewheel will be rotated in accordance with the total accumulation. lIhe #-disk remains stationary during accumulation and is then set in rotation inthe same direction as the #l-disk, to 4restore the accumulator to zero and condition is represented in the Baudet code byv l, 2, 4, 5. This rotation of the typewheel would bring it to the Figures shift position, as will be explained later'. A

If we assume as before that the itl-disk is released but if it be mrtner assumed that the 4t2-disk, thef#3disk, the #4l-disk and the #5- disk are lnot released because storage tumblers 51a, 56a, 55a, and 54a, respectively, are notr ac- 30,tuated to abut and trip the respective pawls-of to permit rotation of the typewheel in the same@ direction of rotation, back to the zero position.`

Referring to the partly diagrammatic illustration in Fig. 19, the description of the operation the printing point. It has been assumed that l of the novel accumulator will 'begreatly simplified.- In Fig. 19, it is assumed that the diameters of the respective accumulator disks have been progressively expanded beginning `at the typewheel end. The typewheel 15 is designated as TW andclockwise rotation is assumed, as indicated by the arrow. The ends T of pawls #la to #5a. inclusive, are indicated in their unoperated or untripped position, wherein they are resiliently positioned in a notchN of the corresponding disk and partly within a fitting notch FN in the successive disk, to thereby lock the disks against rotation. f

Upon actuation of the tumbler 58a, (Fig. 5) corresponding to the pawl #im the upper end T the accumulator, or in other words, assuming the reception of the Baudot code signal 1, the typewheel would be rotated 8 units andthe letter E would be presented on the typewheel at the #6-disk is held stationary while the' accumulation is taking place.

After all of the pawls have been selectively tripped or left unactuated in accordance with 40 the signal code received, the #6-disk is released for rotation in the same direction as the typewheel .and the selectively tripped disks whereby the typewheel is returned to its zero position and the accumulator isreset to zero.

Referring to Fig. 10, the floating gear wheel 11). Pin 50h is engaged of pawl #1a. as viewed'in Fig. 19, will be moved upwardly (to the right as viewed in Fig. 11)

until the said upper end is located entirely in the fitting notch Fljl in the #t2-disk. The #l-disk is thereupon released and is prepared for rotation by the ',oat gear 60(Fig. 9) rotating the i gear 12 (when 12 is released by operation of bellcrank |00) which gear 12 thereupon rotates -tbe #1-disk by means of its sleeve 13 (Fig. 12) to produce rotation `oi the #l-disk, clockwise, asA

viewed in Fig. 19. The #.l-disk will therefore rotate past the end sf the #1a pawruntu the end of the 9os1ot sl in the #l-aisk abuts end S of pawl #1a wherepon rotation is stopped.

Upon release ofthe #2-disk by tripping of pawl #2a by its corresponding tumbler 51o, the upper end of paw1'#2a will be moved upwardly as viewed in Fig. `19 into the fitting notch FN of the #3-disk and the #2-disk is therefore free to rotate 45. Such rotation is produced by a further rotation of #l-disk which -through end S of #la pawl drives #t2-disk. Whenthe #3-disk is released upon tripping .Qf pawl #3a by, tumbler 61 is constantly.' urged counterclockwise, -as shown, by the friction disk means 66h as seen in Fig. 3. Gear wheel 61 is held in mesh `with gear 00 canrying the lock pin 09h (see also Fig. by a lug A|03 on the end of arm |04 of the bell-crank le'ver |05 whichI is constantly urged in a clockwise direction by spring |06 attached to arm |01 at one end thereof andto a fixed point |00 at the other endthere- `.'55 of. The free end of arm |01 carriesa cam follower relier sia eeeperaung; witnthe #r6-disk control cam 53 on the start-stop shaft 5|.

e After each of the' tumblers has been selectively set bythe sequence cams. 5l, 55, 56,-" 01,

*60, and $8 cooperating with the tumblers 54a, 55a,

, 56a, 51a, and 50a, respectively,- and with the vane l0 of the electromagnet 16, and after each of the pawls #1a, #2a, #3a. #4a. and #5a has been A selectively tripped and the respective disks re- G5 leased and after the #l-disk has been rotated an angular amount equal to the sum of the circumferential 'angular extents of the slotsvof the selectively released disks, the rise of cam 53 engages follower' roller 53a- (Fig. 10) and rotates l bellcrank |05 counterclockwise against the force of spring |06, so that` lug |03 Ireleases pin b and gear 09 is thereupon started in rotationl by the floating -gear wheel 61. Such rotation of gear 69 rotates the sleeve 69a (Fig. l2) to thereby rotate the #6-disk in the same direction as taken up in the #1i-disk and this that in which the #l-disk and the selectively released disks were previously rotated. Upon such rotation of the #6-disk, the remaining disks are allowed to rotate and the typewheel will continue its rotation until it has completed 360 of rotation. If, as indicated above, the typewheel has already been rotated' 348% release of all of the an additional unit, as the #fi-disk is rotated and the typewheel will then crank (Fig-9) which stop and lug permit one I complete revolution 'only of the typewheel shaft.

hand end of the arcuate slots in each disk. Since l T of pawl #a was previously into the fitting notch FN of the the wedge end moved entirely #G-disk and since the #i5-disk was at that time Y rotated, the notch N in the #-disk, into which end T of pawl #5a normally ts, is not alined A is moved clockwiseaway therefrom until it engages the left hand end of said slot. whereupon.

under the stress of spring disk |02 and engage the #5-disk. Consequently, the #-disk and the #6- 'k will rotate together until the slack is 1s numbered disks. Eventually all t e disks assume the position as illustrated in Fig. 19 and the #S-disk having rotated 360?, Din 69h (Fig. 10) engages lug |03 and the rotation of the #6-disk is stopped and the accumulator has been reset for another accumulator to be run up thereon.`

Referring to Figs. 20 to 25, inclusive, there is illustrated therein, the novel mechanism for efsame process repeated with respect to each of the lowered fecting printing in conjunction with the typewheel, which wheel is disclosed indetail in Figs. 24 and 25. The typewheel 15a is provided-with two circumferential bands placed side byside axially of the wheel, there,`

perimeter of the typewheel is cut back to form a. recess R so that upon operation of the printing hammer |04 (Fig. 20) the hammer will notv strike the typewheel.

Printing hammer |04 (Fig. 21)` comprises a bell-crank having one arm |04a thereof longer 1s provided adJacent the free end of the arm |04a.

opening |01 and is eccentrically fastened to the.

tape feed cam 6|. A right angle bracket |08 is fastened to plate 4| by a screw |09 and carries at the upwardly extending end thereof a wedge shaped latch ||0 cooperating with a notch on ever, is held in tends to the right (or upwardly as 'viewed in i' forces the tape (Fig. character, thereby producing printing arm itla, to hold the Aprinting arm locked cocked position, sion spring l-iZ howposition by latch ||0 cooperating with notch lll. A platen or hammer head ||4a extends to the left of arm |041: as viewed in Fig. 23 the platen` being alined with the proper band of type characters byl the shift mechanism, will be described lat/er.

Fis'.

22) and provides means upon actuation of positions later.

As seen in Fig; 21, the cocked and held clear of the typewheel. The start-stop shaft is rotating clockwise as indicated by the arrow and has of rotation remaining to complete one revolution thereof. The trip crank 62 isso positioned that it-is about `to'lift the print hammer clear of thevlatch ||0. When the hammer |04 is so released from latch H0, the compression spring 2 drives the print hammer |04 towards the typewheel and the platen ||4a printing` hammer is of the selected character upon the tape. Thecrank pin continues toraise the arm |04a,.which thereby 0 of rotation, at the end of which time the Referring to Figs. 211:0 29 means are illustrated therein for th axially shifting combined typewheel andshift mechanism 15 relongated opening `I|5 extending diagonally thereof, is provided with'a resilient split ring having one side thereof inserted into an the tongue.

and |5b, respectively,-are inserted. A circumferentially extending groove Ila is formed in the interior of hub |2| to receive the resilient ring In. openings |22, ma are formed in the cir which will bedened later.

A slot |24 is formed in the end of shaft 'l0 (Fig. 26) and an opening A|25 is provided in said shaft tov receive a pin |26 therein; f f

Screw holes I21a and ing |21c (Fig. 25) `are provided in the Vtypewheel '|5a which openings are so located as to as shown in Fig. 21. A compresfor producing shifting,

20) against the selected type/ |2'|b and a shaft openvH51) thereby moving the left as viewed in Figs. 22 and 27, the sides of aline with openings |23a, |z3b and |23c, respectively, of the hub |2|. Y

Hub |2| is mounted upon shaft 10 andthe slidable tongue ||5 is inserted into slot |24 in shaft with the ends ||5a and ||5b located in the slots |2|a andk l2lb, respectively, of vhub |2|,

ringand shaft together. Typewhei a is attached to the hub by screws |21, passing, respectively, through the openings |21a, |21b alined,

respectively, with the threaded openings |23a, |23b.

The typewheel isindexed to the figures position or the letters position by the Baudot code signals l, 2,-4, 5 and 1, 2, 3, 4, 5, respectively. Since the translator or accumulator mechanism 1| permits the typewheel to rotate 16 units or 180l in response to signal -3- of the Baudot code, it is seen that the figures and letters positions are 180 apart diametrically opposite. `Upon receipt of the fletters shift signal at the receiver, the accumulator 1| permits the typewheel to rotate until it assumes the letters" position. The typewheel is presumed to be in such a position that the printing platen lliaA is alined with' the gures, band of characters onthe typewheel. vAfter the rotation of the typewheel to the "letters position and upon actuation of the printing hammer, the platenr114a enters a blank space on the typewheel and the lug |4b abuts the edge of arm the slidable tongue ||5 to the slot'||6 riding on the pin |26 thereby sirnul` taneously shifting the tongue ||5 and the combination printing and shifting mechanism 15,

` axially upward, as viewed in Fig.'22, until the pin |26 abuts the bottom right hand end of slot ||6, whereupon the letters band of characters is alined with the platen ||4a.

When a figures shift signal is received sequentially to the above, the end ||5a-of tongue ||5 will be rotated into alin'ement with the lug or in other words, are

-|b thereupon rotates leverv Iwise and ratchet |35a is the ratchet pawl- |35a to both attached tothe shaft. A well known type of spring tension belt |36 is connected between pulleys |3| and |32`^whereby the pulley |3| is rotated upon rotation of pulley |32 on shaft |33. A grooved pulley |31 ismounted on shaft |33 carrying a carbon take up spool |39. `A flexible belt' |36a connects pulleys |34 and |31 whereby shaft |38 is rotated by the ratchet wheel |35 as will now be described.

Referring to Fig. 20, a pawl|35a is pivotally mounted on the end |a of `an elongated follower lever |40 pivoted at |4|.- The end '|40b of the follower lever abuts the tape feed cam 6| andis resiliently held in contact therewith by means of spring |35b attached to pawl |35a atone end and to the plate 4| at the other end thereof. As the start-stop shaft 5| (Fig. 5) rotates thereby rotating the tape feed cam 6|, cam 6| carrying the tripv crank 62 rotates to release the print hammer as above described and upon continuing the rotation thereof a flat side 6|a of cam 3| is alined with the follower lever end |40b. lSpring |40 counterclockplaced behind a succeeding-tooth on ratchet wheelA |35. As cam 3| continues its rotation, the flat side 6|a thereof is removed from contact with lever end |40b and the full circumference of the cam engages |40b whereby lever |40 is rotated clockwise to move` the left to thereby advance ratchet wheel |35 one tooth.v Rotation of wheel |35 rotates shaft |33 and pulleys |32 and ||4b and the combined printing and shifting mechanism 15 will be moved axially downward, as viewed in Fig. 22g to aline the figures band of characters with the platen ||4a.

.Referring to Figs. 1, z and 2o, there is inus-y trated therein novel means for feeding the tape,

from the, idler feed spool, across the printing face of typewheel 15a and across the receiver mechanism to the tape rewind spool. Means are also provided for separately taking up the carbon after the respective carbon and paper tapes of the duplex tape have. together passed between the printing elements.

A roll of duplex tape |28.comprising the paper tape |200. (Fig. 1) and carbon tape |281;l (Fig..

A20) is wound upon an idler spool |29 mounted by hubs or sleeves |29a for rotation on a rewind shaft |30 journaled in plates 4| and 42. -A

grooved pulley |3| is fastened to shaft |30 for `rotation thereof, well known snap fastening means being providedl between the' pulley |3| and the 'shaft |30- whereby the pulley can be easily detached to allow removal of idler spool |23. A grooved pulley |32. is mounted on and connected to a shaft |33 upon which are also sequentially mounted, in back of pulley |32, a'

grooved pulleyr|34 and a feed ratchet wheel |35,

spool |42 as above surface |44b (Fig.

. paper tape and carbon tape |34 (Fig. 2) therebyrotating pulleys |23 and |31, respectively, to rotate the rewind shaft |30 and the carbon take up spool |39. The far side of rewind shaft |30 has removably attached thereto a tape rewind wheel |42 (Fig. l)

The duplex tape is fed from idler spool |23, between the feed surface of ratchet wheel |35 and the tape jockey roller |35c, between guides |43, and between the typewheel 15a and the platen ||4a. -After passing between the typewheel and the platen, the carbon and paper tapes are ser arated and the paper tape |23a is fed across the guide surface 44a, across they receiver to guide bon tape |20b, however, is fed upwardly from the typewheel (Fig. 20) to |39 at the same time as `the record tape |230r is being fed across the receiver to the rewind respective pulleys are so and tape-up spools always tend to wind up the fasterv than the duplex tape is fed for printing.

The operation of the the sequential relationship of the operation of the various elements will be more clearly understood when described in connection with the timing diagram of Fig. 30. The angular'amounts of rotation of the respective elementsare all referred to the rotation of the start-stop shaft and since the typewheel and accumulator disks revolve more rapidly than the start-stop shaft as explained above, the extent of'their angular motion is illustrated inA terms of rotation of-the start-stop shaft. Upon receipt of the start ele-v is released, the start-stop trip leverv3| releases pin 52 `and the start-stop shaft 6| begins to roupon rotation of shaft |33 1), and thence to the rewindv spool |42-where the message is stored. The carthe carbon take up spool i described. The sizes of the chosen that therewind device andjparticularly 'l sented in Fig. 3() by IIc,y IIIc,

tate, the timed relation beingas illustrated in Fig. 30. Upon receipt of the rst signal element or section which will be assumed to be a condition of energization of the line or an on condition, as represented by Ia in Fig. 30, the storage tumbler 58a, represented by Ic in Fig. 30 and controlling the #1-disk of accumulator 1|, will be held by armature 18a in position to be operated by sequence cam 58, represented by IB in Fig. 30, to force lug 90 (Fig. 6) of tumbler 58a against wedge element T of pawl #la to trip the '#.6-disk driven by I'7 |28 against the selected letter or gure character to print'the same upon the record tapelIZBa. The trip crank thereupon removes platen Illa from engagement with the tape whereupon the its sleeve 69a and the gear 59,

begins the rotation ,of the typewheel as explained pawl which when gear I2 is released, will release the- #1-disk for 90 of rotation thereby permitting a 90 rotation of the typewheel, represented in terms of rotation of the start-stop shaft by ID of Fig. 30. Upon tripping of the #la pawl, as is seen from Fig. 30, the #l-disk does not rotate and the typewheel shaft is not immediately released for rotation, since the #l disk control cam, (Fig. 9) does not operate bell-crank |00 through cam follower 60a to release stop 98 from engagement with stop pin 12b until later, the release being timed to occur after therestoring cycle is completed whereupon floating gear 68"drives gear l2 to rotate the typewheel shaft and the typewheel under the control of the released #1-dis'k as described above. The operation of the #1 disk control cam 6U is 'timed to release the #l disk as indicated in Fig. 30. If all of the signal elements from l to inclusive are on signals, the storage tumbler's- 51a, 56a,

IVe, Vc, respectively, will be actuated at the center of signal elements IIA, IIIA, IVA, VA, respectively by their respec tive sequence cams 5l, 56, 55 and 54 represented in Fig. as IIB, IIIB, IVB and VB, respectively, to therebytrip the pawls #2a, #3a, #4a and #5a, respectively, as indicated in Fig. 30. While pawl #2a is tripped as indicated in Fig. 30, since we have assumed that pawl #la was also tripped,

control cam.60, called on the start-stop shaft 55a, and. 54a reprevand since the :f2-disk is not driven by the '#1- 'i disk, until the #l disk has rotated 90 (Fig. 19), the #2-disk will not start its rotation until the rotation oi #l disk is completed as illustrated in Fig. 30. The #3 disk will begin its rotation, however, as soon as pawl #3a is tripped, as indicated in Fig. 30, since the #2 disk has completed its rotation, before pawl `#3a is tripped.

Pawl #411, however, is tripped before 'the #3 `simple compact receiver for above in its same direction of rotation tothe zero position thereof where it is stopped by pin 72b `engaging stop 98 (Fig. 9), and likewise rotation of #-disk restores the accumulator disks to their initial position during the restore part of the cycle as indicated in Fig. 30.

While the accumulator. disks are being restored, as is seen from'Fig. 30, the flat part Sla (Fig. 20)

of cam 6| permits movement of pawl |35a to the right and thereupon cam 6| moves the pawl to the left to' actuate the ratchet wheel |35 to advance the tape.

During this same'part of the cycle, cam 59 (Fig. 6) actuates cam follower 91 and lever94v to operate the reset vane 92 to reset the storage tumblers as indicated by reset in Fig. 30 and the start-stop shaft is stoppedshortly thereafter by pin 52 (Fig. 8) engaging with lug 8|b on the' start-stop trip lever 8 I.

The #6-disk has meanwhile been restoring the accumulator. disk, and as is seen from Fig. 30

this restoration continues even after the start- I stop shaft has beenlstopped and subsequently released for rotation on its succeeding `cycle vand such restoration continues up tothe time that 1 sequence cam 58 again engages storage tumbler 58a in the middle of therst section Ia of the succeeding signal. An overlap is therefore provided so that the operation-of the receiver can be started while a translator or accumulator is being restored to zero position. v

Novel means are therefore provided whereby a printing telegraphy is provided, wherein the signals are restrained in their effect to their sequential occurrences,1 wherein restoration of the typewheel and accumulator occurs in the same direction of rotation as during the setting thereof, and wherein an extremely simple and effective mechanism is prof vided.

While there has d outthe fundamental novel features of the invention as applied to a single modication it disk has completed its rotation and therefore the #4 disk will not begin its rotation until the #3 disk has fully completed its 180 rotation as i1 lustrated in Fig. 30. Y

Upon tripping of pawl #5a, the- #5a disk will immediately begin its rotation since the rotation of the #4 disk is completed a short time before pawl #5a is tripped, the center of signal illustrated in Fig. 30. After the #-disk has been released and the typewheel shaft rotated the '11%.o pertaining to this disk, the shaft is momentarily stopped by the stop end S of pawl #5a engaging the end of the circumferential slot S5 in the #5-disk.

Shortly thereafter the #S-release cam 53 (Fig. l) releases pin 6927 on gear 69 connected to the which tripping occurs at element or section VA aswill be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made byy thoseskilled in the lart without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims.

What is claimed is:

1. In a device of the character described, a

rotatable shaft, a crank on said shaft, a printing` platen, means mounting said platen for oscillation and movement of translation, spring means cooperating with said platen and resisting trans- #G-disk, to thereby permit floating gear 61 toi4 rotate gear 69 (Fig. 1l), sleeve 69a and the #6- diskto thereby restore the typewheel andthe accumulator disks. i

Just prior, however, to the release of the #6- 'i disk, as is seen from the diagram of Fig. 30, the trip crank 62 (Fig. 2l) releases the trip hammer |04 and the platen ||4a forces the duplex tape lation thereof, means on said platen engageable by said crank during a portion of the rotationy of said shaft to translate said platen against the force of said spring means to stress said means and to thereby cock said platen, means locking said platen in cocked position, and means on said during another said platen and release the latter from said locking means foroperation by said spring means.

i 2. In a, device of the character described. a crank, La printing platen, mea mounting 'said platen for oscillation and movement oi.' translaing successively v platen .in response tion, a slot formed in said platen, said crank beengageable with the different walls of said slot to oscillate and translate said platen, locking means for said platen engageable by means on s'aid platen upon movement of said to engagement of one wall of said slot by id crank, and means urging said platen away from said locking means and rendered eifective upon release of said platen in response to engagement of said'crank with another wall of said slot, to operate said platen.

3. In a device of the character described, a platen having an elongated aperture and a generally lsemi-circular aperture, means engaging the walls vof said elongated aperture for pivotally and slidably mounting said platen, a locking member, means on said platen for engaging said member, means opposing movement of said platen, and a crank successively engageable with the walls of. said semi-circular aperture upon rotationk of said crank to translate said platen against the force of said opposing means and engage said locking member and engaging means. A

4. In a device of the character described, a generally bell-crank shaped platen, an elongated opening in said platen, a pivot mounted in said opening, spring biasing means opposing movement of said platen, locking means, means on with said locking means aperture in said said platen engageable 20x kthereby oscillate and l 6. In a printing at a portion of the rotation thereof ber, an elongated crank shaped member at one end thereof, a

platen, and a crank successively engageable with all sides of said aperture during rotation of said crank, said crank oscillating said platen to release saidengageable means from said locking means during engagementof said crank with one side of said aperture and said crank translating said platen against the force of said spring biasing means to engage said locking means and engageable means during engagement of said crank with another side of said aperture.

5. In a printing telegraph, a platen, means mounting said platen for oscillation and movementvof translation, movement of translation, a crank, latch means, means on said platen engageable by said crank to translate said platen against thev force of said resilient means and oscillate said platen into engagement with said latch means, and means on said platen engageable by said crank at another portion of the rotation thereof to remove said platen from said latch means.

telegraph, a printing element comprising an elongated, bell-crank shaped memslot in one arm of said bellf rounded slot in the other end thereof, a hammer extending from the other arm of said bell-crank shapedmember in one direction, and a lug on said arm extending in a different direction.

HARRY J. NICHOLS.

resilient means opposing said y 

